Frost line depth in Penobscot County, ME

How deep the ground freezes in Penobscot County, ME

51 in. Dig to 51 in, just below the frost. Nearest NOAA station: Lincoln Sanitary District/Wtp, 8 mi.

Your building department sets the legal frost line depth (IRC Table R301.2(1)); footings must go below it (R403.1.4.1). Call them before you dig.

Code depth · Snow